SyntaxError: Unexpected token function

[Harfus]

Hello,

I downloaded and built the package but encountered this error.

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harfus-MacBook-Pro-2:mobx-starter harfuab$ node index.js --dev
INF Running on port 2002
/Users/harfuab/dev/mobx/support-service/mobx-starter/node_modules/koa-mount/index.js:48
return async function (ctx, upstream){
^^^^^^^^
SyntaxError: Unexpected token function
at Object.exports.runInThisContext (vm.js:76:16)
at Module._compile (module.js:542:28)
at Module._extensions..js (module.js:579:10)
at Object.require.extensions.(anonymous function) [as .js] (/Users/harfuab/dev/mobx/support-service/mobx-starter/node_modules/babel-register/lib/node.js:152:7)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Module.require (module.js:497:17)
at require (internal/module.js:20:19)
at Object. (/Users/harfuab/dev/mobx/support-service/mobx-starter/server/server.js:18:17)
at Module._compile (module.js:570:32)
at loader (/Users/harfuab/dev/mobx/support-service/mobx-starter/node_modules/babel-register/lib/node.js:144:5)
at Object.require.extensions.(anonymous function) [as .js] (/Users/harfuab/dev/mobx/support-service/mobx-starter/node_modules/babel-register/lib/node.js:154:7)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
Asset Size Chunks Chunk Names
bundle.js 2.58 MB 0 [emitted] [big] bundle
bundle.css 5.89 kB 0 [emitted] bundle
bundle.js.map 2.81 MB 0 [emitted] bundle
bundle.css.map 16.5 kB 0 [emitted] bundle
webpack: Compiled successfully.

---

If I browse to http://localhost:2002, I got

Cannot GET /

I appreciate if you provide some pointers.

Thanks